Date:         Wed, 27 Jan 2016 22:07:18 -0500
Reply-To:     Dennis Haynes <d23haynes57@HOTMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Dennis Haynes <d23haynes57@HOTMAIL.COM>
Subject:      Re: Engine Bay Wiring Harness
Comments: To: Larry Alofs <lalofs@GMAIL.COM>
In-Reply-To:  <CA+r=Jhr24b6DXm2OS-mUf7CJ8ZGJ4SEqW8aEsZPL6vF__zqz_Q@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"

There is a connection from the starter solenoid into the ECU circuit. Goes to terminal 23 on the ECU, a contact on the Digifant control unit relay and one side of the coil on the fuel pump relay. Looking at this I see the control unit relay has a diode on that contact. So it looks like activating the starter bypasses one side of the control unit relay to get the ECU going, tells it to inject fuel for starting, not running and activates the fuel pump until the distributor pulses and engine running put it in the normal run mode. Looking at this some combination of the wrong control unit relay and a starter relay can make the starter run on. Back on the air cooled busses this connection to the solenoid actually went to a contact on the starter solenoid separating it from the key switch wire. There is more going on here than the obvious. 

Dennis
 

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of Larry Alofs
Sent: Wednesday, January 27, 2016 9:45 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: Engine Bay Wiring Harness

Could you explain "back fed" in this situation?

Thanks


On Wed, Jan 27, 2016 at 9:24 PM, Dennis Haynes <d23haynes57@hotmail.com>
wrote:

> Has it been determined if this was the cause of the runaway starter or 

> if the runaway starter back fed and fried the harness?
>
> Dennis
>
>
> -----Original Message-----
> From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On 
> Behalf Of John Rodgers
> Sent: Wednesday, January 27, 2016 12:42 PM
> To: vanagon@GERRY.VANAGON.COM
> Subject: Engine Bay Wiring Harness
>
> I have found my wiring harness is fried. Wires throughout are burned 
> making for shorts all over.  Second time this has happened. Totally sucks.
>
> Has anyone got a good one laying about that you would be willing to 
> part with?
>
> Thanks.
>